<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        h1 {
            font-size: 100px;
            font-weight: 900;
            text-align: center;
            background: linear-gradient(to right, red, blue);
            background-clip: text;
            color: transparent;
            /* display: block; */
        }
    </style>
</head>

<body>
    <h1>Hello World</h1>
</body>

</html>